Improvement in shuttle drop-box mechanisms



UNITE rrrcn.

IMPROVEMENT IN SHUTTLE DROP-BOX MECHANISMS.

l Specication forming part of Letters Patent No. 117,523, dated August1, 1871.

To all whom it may concern:

Be it known that I, 4JOHN DYSON, of the city and county of Philadelphiaand State of Pennsylvania, have invented a new and useful Mode ofOperating Levers of the Drop-Box Chain of Looms; and I do hereby declarethe following to be a clear and exact description of the nature thereof,suiiicient to enable others skilled in the art to which my inventionappertains to fully understand and use the same, reference being had tothe accompanying drawing making part `of this specification, in Which-Figure 1 is a side view of the device illustrating my invention. Fig. 2is a top or plan view of a portion thereof. Fig. 3 is an end view partlyin section.

Similar letters of reference indicate corresponding parts in the severalfigures.

lVly invention relates to an improved motion for levers operated by thedrop-box chain; and consists of levers which are placed or mounted upona double eccentric, one lever on each ee centric constituting theprincipal levers, being connected directly with the attachments of thebox-motion by leather thongs or otherwise, in the usual manner.

By this invention there is great saving of labor and expense. A tineshuttle pattern can be worked by the drop-box motion ou a loom withthree boxes at each side with, say, one-half of the number of links inthe box-chain that isrequired by the method now in use, and there isconsiderable reduction of weight on the loom.

In the drawing, A represents the drop-box chain, to which motion iscommunicated in any well-known manner, B B B B are levers arranged abovethe box-chain, and having their bearings in a double eccentric, C, whoseaxis C isproperly secured to a suitableJ portion of the loom, motionbeing imparted to the eccentrics by connections with the parts whichoperate the box-chain or otherwise. These levers in the present case arefour in number, two of them being mounted upon and operated by oneeccentric, and two upon and by the other eccentric, so that when theulcrum of one pair is down the other is up, and vice versa, B Brepresent the principal levers, and are placed on different eccentries.

They areconnected to the 4appendages or attachments of the box-1notionby leather thongs D, or otherwise, in the usual manner. The other leversB B are auxiliary levers, and pass over a rod, D, which is secured tothe proper portion of the loom, and acts as a fulcrum to said levers, sothat as the ends ot' the levers on the eccentric are raised the otherends are lowered, and vice versa. The leversB B have attached to orformed with them pieces E F. The piece E extends over the levers B, andthe piece F extends over the lever B,-and both pieces are provided withscrews c c for adjustment purposes.

When the eccentric respectively depresses the connected ends of theauxiliary levers, the free ends come in contact with the pieces on theprincipal levers and raise. the latter to such a height as to preventthe box from changing. This arrangement enables the boxes on each sideof the loom to be changed alternately without pulling the chain overevery pick. For, if areverse roll is under thelever of the left-hand boxwhile the shuttle is on the right-hand box, the eccentric being raised,the roll acts as a fulcrum and depresses the end ofthe lever, thuspreventing the left side from changing until the eccentric is lowered,which occurs at the proper moment. If a tube or blank be under the samelever, the auxiliary lever on the other side, being raised as itseccentric is lowered, comes in contact with the connection upon theprincipal lever and raises it so as to prevent the box from changinguntil the one eccentric is raised and the other lowered.

Then the tube or blank will have the usual ef feet upon the lever,allowing the box-cam to be pushed forward.

The operation of the lever for the right hand will be similar to thathereinbefore stated.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The series of levers B B vB B operated at one end by the eccentric C,and connected at the oth er end to the attachments ofthe box-motion, incombination with the rod D and the drop-box chain A, the parts bein gconstructed and arranged to operate in the manner and for the purposeset forth.

2. The rod D', as arranged with the auxiliary levers B B", incombination With the principal the box-motion, substantially as and forthe purlevers B B, the box-chain A, and the attaohpose described.

ments of the box-motion, the parts being oon- The above specification ofmyinvention signed structed and operating substantially in the, man; byme this 25th day of May, 1871.

ner and for the purpose set forth. JOHN DYSON.

3. The pieces E F and set-screws a a, in com- Witnesses:

bination with the levers B B B B" and with J oHN A. WIEDERsHEIM,

the box-chain A, rod D', and the attachments of PERCY V. KNEASS.

